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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Hybrid Control System - Diagnostic Codes (3 Of 5)) >> HYBRID CONTROL SYSTEM (for 1Motor-HEV Model) >> DTC P0AE4-11: Hybrid/EV Battery Precharge Contactor Circuit Short to Ground [09/2023 - ] >> Procedure

DTC P0AE4-11: Hybrid/EV Battery Precharge Contactor Circuit Short to Ground [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - BODY GROUND) 

    Pre-procedure1

    • Disconnect the hybrid vehicle control ECU assembly connector.
    • Measure the resistance according to the value(s) in the table below.
      GTY1231639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      D44-16 (SMRP) - Body ground Ignition switch off 140 to 290 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the hybrid vehicle control ECU assembly connector.

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR) 

    Refer to PROCEDURE - Step 4

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  3

  3. CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR) 

    Refer to PROCEDURE - Step 7

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 1 TRACTION BATTERY DEVICE BOX) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

    • Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the service information because this may cause a malfunction.

    • Remove the No. 2 traction battery device box.

      HINT: 

      Refer to REMOVAL [09/2023 - ]

    • Disconnect the No. 1 traction battery device box connector.
      GTY1230409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Disconnect the hybrid vehicle control ECU assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      D44-16 (SMRP) or z15-6 (SMRP) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the hybrid vehicle control ECU assembly connector.
    • Reconnect the No. 1 traction battery device box connector.
    • Install the No. 2 traction battery device box.

    Result: 

    OK 

    REPLACE NO. 1 TRACTION BATTERY DEVICE BOX. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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